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W. G. HOOD. SCHOOL DESK STANDARD.

No. 594,084. Patented Nov. 23,1897.

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UNITED STATES PATENT. @FFIQE.

WILLIAM o. 1-1001), F RACINE, WISCONSIN, AssieNoE- TO THE EAoiNEHARDWARE COMPANY, or sAME PLAoE.

SCHOOL-DESK STANDARD.

SPECIFICATION forming part of Letters Patent No. 594,084, dated November23, 1897.

' Application filed February 18, 1897. Serial No. 623,924. 7 (No model.)

To aZZ whom it may concern.-

Be it known that LAWILLIAM O. HOOD, a citizen of the United States, anda resident of Racine, in the county of Racine and State of WVisconsin,have invented certain new and useful Improvements in School-DeskStandards; and I do hereby declare that the following is a full, clear,and exact description thereof.

My invention has for its object to provide a simple economical schooldesk standard having a vertically-adjustable section and certainfeatures of advantage resulting from the peculiarities of constructionand combi-, nation of parts hereinafter set forth with reference to theaccompanying drawings and subsequently claimed.

Figure 1 of the drawings represents an inside elevation of a school-deskstandard embodying my improvements, certain of the parts being brokenaway and in section; Fig. 2, a detail elevation illustrating a reversalof the detent shown in the preceding figure; and Figs. 3, 4:, and 5,sectional views respectively indicated by lines 3 3, 4 4, and 5 5 in thefirst figure.

Referring by letter to the drawings, A represents the skeletonfioor-section, and B the skeleton desk-section,of my improved schooldeskstandard, the latter section being vertically adjustable on the formersection for the purpose of varying the elevation of the desk to which itmay be fastened.

As is usual in the art towhich my invention relates, thestandard-sections are of castiron, the floor-section A being providedupon its inner side with vertical concave grooves 17, that act as guidesfor vertical branches 0 of the desk-section B, these branches beingoutwardly convex in order to have sliding fit in said grooves.

At its upper end the floor-section of the standard is provided with across-brace d,

herein shown as having outwardly-extending guide-lugs e, engagingconcave inner faces of the branches 0 pertaining to the desk-section ofsaid standard.

. On its inner side the floor-section of the standard is provided withan gularly-notched lateral lugs f, constituting seats for correspondingly-reduced ends of a crossbar O, that opposes the branches 0 belongingto the desksection of said standard, this cross-bar being provided withan angular central recess that constitutes a seat for acorrespondinglyshaped nut D run on the end of a preferably screw-headedbolt E, having bearing in a standard-web h and cross-bar O, the latterbeing detachable and held in place by means of said bolt and nut.

The boltE constitutes a pivot for a gravitydetent F, engaging with arack 71 on an edge of one of the branches 0 of adjustable desk-section13 of the standard, the detent being intermediate of web h and cross-bar0, above specified. A hand-lug j at the lower end of detent F extendsthrough a segmental slot in web h of the floor-section A of thestandard, and thus provision is had for convenient manipulation of saiddetent, the latter in its engagement with the rack t' serving asasupport for the desk-section B of the standard in adjusted position.The detent in the position,shown in Fig. 1 will automatically engagewith the rack when the desk-section'B of the standard is elevated, andif it be swung back out of this position to that shown in Fig. 2 the camportion m of said section will operate upon lug j to throw said detentinto working position when the standard is assembled.

The desk-section B of thestandard is provided with an inwardly-extendedstop-lug 1", that comes into contact with the upper edge of cross-braced of the floor-section A to limit the descent of said desk section,upward movement of the latter being limited by a foot-lug s on one ofits branches coming into contact with the under edge of the cross-bar 0when the latter is positioned. By tightening the bolt E the cross-bar Ois caused to exert clamping pressure against the branches of thedesk-section B of the standards, and thus this section is securelylocked in its adjusted position. Owing to the fact that a tool isnecessary to loosen bolt E the desk-section of the standard is notordinarily susceptible of indiscriminate adjustment, and the crossbar 0being drawn tight in its seat there cannot be any loose play or rattleof the parts that go to make up said standard.

Having thus described my invention, what I claim as new, and desire tosecure bycLetters Patent, is

1. A school-desk standard comprising a floor-section, a desk-section inadjustable clamp connection with the former section and provided with arack, a pivotal detent en gageable with the rack, a hand-lu g extendingfrom the detent through a segmental slot in said floor-section, and acam on the desk-section operative against said lug to throw said detentfrom idle to working position.

2. A school-desk standard comprising a floor-section provided withvertical guidegrooves, an upper cross-brace and notched lateral lugs; adesk-section having branches engaging said guide-grooves outside of saidcross-brace and one of these branches provided with a rack, a crossbarhaving reduced angular ends seated in the floor-section lugs to therebyoppose said branches of the desksection, a clamp-bolt and nut connectingthe cross-bar with said floor-section, and a rackengaging detent havingsaid bolt for its pivot.

n i I 594,084

3. A schooldesk standard comprising a floorsection provided withvertical guidegrooves and an upper cross-brace, a desk-section havingbranches engaging said guidegrooves outside of said cross-brace and oneof these branches provided with a rack, a detachable cross-bar supportedon the floor-section in opposition to said branches, a clampbolt and nutconnecting the cross-bar with said floor-section, a rack-engaging detenthaving said bolt for its pivot, and stop-lugs on said desk -sectionarranged with respect to the aforesaid cross-brace and crossbar to limitvertical movement of the latter standard-section in either direction.

In testimony that I claim the foregoing I have hereunto set my hand, atRacine, in the county of Racine and State of Wisconsin, in the presenceof two Witnesses.

XVILLIAM O. HOOD.

Witnesses:

FRANK E. NAYLOR, HARRY R. TIcKNOR.

